Target armv8-a for Linux/Arm64 portable builds build

Signed-off-by: nyanmisaka <nst799610810@gmail.com>

builder/images/base-linuxarm64/Dockerfile

@@ -43,7 +43,7 @@ RUN git clone --filter=blob:none --depth=1 https://github.com/yugr/Implib.so /op
 
 ENV FFBUILD_TOOLCHAIN=aarch64-ffbuild-linux-gnu
 ENV PATH="/opt/ct-ng/bin:${PATH}" \
-    FFBUILD_TARGET_FLAGS="--pkg-config=pkg-config --pkg-config-flags=--static --cross-prefix=${FFBUILD_TOOLCHAIN}- --arch=aarch64 --target-os=linux" \
+    FFBUILD_TARGET_FLAGS="--pkg-config=pkg-config --pkg-config-flags=--static --cross-prefix=${FFBUILD_TOOLCHAIN}- --arch=aarch64 --cpu=armv8-a --target-os=linux" \
     FFBUILD_CROSS_PREFIX="${FFBUILD_TOOLCHAIN}-" \
     FFBUILD_RUST_TARGET="aarch64-unknown-linux-gnu" \
     FFBUILD_PREFIX=/opt/ffbuild \
@@ -56,8 +56,8 @@ ENV PATH="/opt/ct-ng/bin:${PATH}" \
     AR="${FFBUILD_TOOLCHAIN}-gcc-ar" \
     RANLIB="${FFBUILD_TOOLCHAIN}-gcc-ranlib" \
     NM="${FFBUILD_TOOLCHAIN}-gcc-nm" \
-    CFLAGS="-static-libgcc -static-libstdc++ -I/opt/ffbuild/include -O2 -pipe -fPIC -DPIC -D_FORTIFY_SOURCE=2 -fstack-protector-strong -pthread" \
-    CXXFLAGS="-static-libgcc -static-libstdc++ -I/opt/ffbuild/include -O2 -pipe -fPIC -DPIC -D_FORTIFY_SOURCE=2 -fstack-protector-strong -pthread" \
-    LDFLAGS="-static-libgcc -static-libstdc++ -L/opt/ffbuild/lib -O2 -pipe -fstack-protector-strong -Wl,-z,relro,-z,now -pthread -lm" \
+    CFLAGS="-static-libgcc -static-libstdc++ -I/opt/ffbuild/include -O2 -pipe -march=armv8-a -fPIC -DPIC -D_FORTIFY_SOURCE=2 -fstack-protector-strong -pthread" \
+    CXXFLAGS="-static-libgcc -static-libstdc++ -I/opt/ffbuild/include -O2 -pipe -march=armv8-a -fPIC -DPIC -D_FORTIFY_SOURCE=2 -fstack-protector-strong -pthread" \
+    LDFLAGS="-static-libgcc -static-libstdc++ -L/opt/ffbuild/lib -O2 -pipe -march=armv8-a -fstack-protector-strong -Wl,-z,relro,-z,now -pthread -lm" \
     STAGE_CFLAGS="-fvisibility=hidden -fno-semantic-interposition" \
     STAGE_CXXFLAGS="-fvisibility=hidden -fno-semantic-interposition"