JNI-120 Android build: Update sequoia version and use rust nightly

Currently is needed to use rust nightly to cross-build the latest sequoia version for Android.

Before building again is needed to run, on the build machine:
    rustup default nightly
    rustup update nightly
    rustup component add rust-src
    rustup target add aarch64-linux-android armv7-linux-androideabi i686-linux-android x86_64-linux-android

android/external/Makefile.conf

@@ -20,7 +20,7 @@ NETTLE_VERSION=3.4.1
 
 ### Git deps repos
 EXTERNAL_GIT_REPOS += libetpan|https://github.com/fdik/libetpan.git?HEAD
-EXTERNAL_GIT_REPOS += sequoia|https://gitlab.com/sequoia-pgp/sequoia.git?de497f59570437d448b293769eb57bf7a9741f30
+EXTERNAL_GIT_REPOS += sequoia|https://gitlab.com/sequoia-pgp/sequoia.git?365d00a08bec6a5a48d48a7c7893d78c27092b59
 
 ### Common variables
 #### Source code targets

android/external/arm64-v8a/Makefile

@@ -222,7 +222,7 @@ $(LOCAL)/lib/libssl.so: openssl/libssl.so
 		cp libcrypto.so $(LOCAL)/lib && \
 		cp libcrypto.a $(LOCAL)/lib && \
 		cp libssl.so $(LOCAL)/lib && \
-		cp libssl.a $(LOCAL)/lib 
+		cp libssl.a $(LOCAL)/lib
 	ls -l $(LOCAL)/lib/libssl.so
 
 openssl-build: openssl/libssl.so
@@ -328,8 +328,7 @@ $(CARGO_TARGET_DIR)/aarch64-linux-android/release/libsequoia_openpgp_ffi.so:  se
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_LIB_DIR="$(LOCAL)/lib" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_INCLUDE_DIR="$(LOCAL)/include" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_DIR="$(LOCAL)/bin" \
-	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) cargo build --target aarch64-linux-android -p sequoia-openpgp-ffi --release
-
+	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) rustup run nightly cargo build --target aarch64-linux-android -p sequoia-openpgp-ffi --release -Z build-std=core,alloc,std
 
 $(LOCAL)/lib/libsequoia_openpgp_ffi.so: $(CARGO_TARGET_DIR)/aarch64-linux-android/release/libsequoia_openpgp_ffi.so
 	cp $(CARGO_TARGET_DIR)/aarch64-linux-android/release/libsequoia_openpgp_ffi.* $(LOCAL)/lib/

android/external/armeabi-v7a/Makefile

@@ -330,7 +330,7 @@ $(CARGO_TARGET_DIR)/armv7-linux-androideabi/release/libsequoia_openpgp_ffi.so:
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_LIB_DIR="$(LOCAL)/lib" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_INCLUDE_DIR="$(LOCAL)/include" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_DIR="$(LOCAL)/bin" \
-	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) cargo build --target armv7-linux-androideabi -p sequoia-openpgp-ffi --release
+	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) rustup run nightly cargo build --target armv7-linux-androideabi -p sequoia-openpgp-ffi --release -Z build-std=core,alloc,std
 
 
 $(LOCAL)/lib/libsequoia_openpgp_ffi.so: $(CARGO_TARGET_DIR)/armv7-linux-androideabi/release/libsequoia_openpgp_ffi.so

android/external/x86/Makefile

@@ -327,7 +327,7 @@ $(CARGO_TARGET_DIR)/i686-linux-android/release/libsequoia_openpgp_ffi.so:  sequo
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_LIB_DIR="$(LOCAL)/lib" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_INCLUDE_DIR="$(LOCAL)/include" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_DIR="$(LOCAL)/bin" \
-	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) cargo build --target i686-linux-android -p sequoia-openpgp-ffi --release
+	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) rustup run nightly cargo build --target i686-linux-android -p sequoia-openpgp-ffi --release -Z build-std=core,alloc,std
 
 
 $(LOCAL)/lib/libsequoia_openpgp_ffi.so: $(CARGO_TARGET_DIR)/i686-linux-android/release/libsequoia_openpgp_ffi.so

android/external/x86_64/Makefile

@@ -327,7 +327,7 @@ $(CARGO_TARGET_DIR)/x86_64-linux-android/release/libsequoia_openpgp_ffi.so:  seq
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_LIB_DIR="$(LOCAL)/lib" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_INCLUDE_DIR="$(LOCAL)/include" \
 	ARMV7_LINUX_ANDROIDEABI_OPENSSL_DIR="$(LOCAL)/bin" \
-	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) cargo build --target x86_64-linux-android -p sequoia-openpgp-ffi --release
+	CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) rustup run nightly cargo build --target x86_64-linux-android -p sequoia-openpgp-ffi --release -Z build-std=core,alloc,std
 
 
 $(LOCAL)/lib/libsequoia_openpgp_ffi.so: $(CARGO_TARGET_DIR)/x86_64-linux-android/release/libsequoia_openpgp_ffi.so