Increase build parallelism

Change-Id: Ie3a8470773347e1c6dee4bd81c51987a102a5db7

Author: killenheladagen

Dockerfile.aarch64

@@ -102,7 +102,7 @@ cmake \
     -DgRPC_BUILD_TESTS=OFF \
     -DgRPC_SSL_PROVIDER=package \
     ../..
-make -j4 install
+make -j8 install
 EOF
 
 # return to build dir
@@ -117,7 +117,7 @@ mkdir -p openssl-1.1.1l/build
 cd openssl-1.1.1l/build
 rm -rf ../doc
 ../Configure linux-armv4 no-asm --prefix=$TARGETSYSROOT/usr
-make CC=aarch64-linux-gnu-gcc
+make -j8 CC=aarch64-linux-gnu-gcc
 make install
 EOF
 
@@ -137,7 +137,7 @@ CXXFLAGS="$CXXFLAGS -g0" cmake \
     -DgRPC_SSL_PROVIDER=package \
     -DCMAKE_BUILD_TYPE=Release \
     ../..
-make -j4 install/strip
+make -j8 install/strip
 cp -r /opt/grpc/third_party/googletest/googletest/include/gtest \
     "$SDKTARGETSYSROOT"/usr/include
 EOF

Dockerfile.armv7hf

@@ -102,7 +102,7 @@ cmake \
     -DgRPC_BUILD_TESTS=OFF \
     -DgRPC_SSL_PROVIDER=package \
     ../..
-make -j4 install
+make -j8 install
 EOF
 
 # return to build dir
@@ -117,7 +117,7 @@ mkdir -p openssl-1.1.1l/build
 cd openssl-1.1.1l/build
 rm -rf ../doc
 ../Configure linux-armv4 no-asm --prefix=$TARGETSYSROOT/usr
-make CC=arm-linux-gnueabihf-gcc
+make -j8 CC=arm-linux-gnueabihf-gcc
 make install
 EOF
 
@@ -137,7 +137,7 @@ CXXFLAGS="$CXXFLAGS -g0" cmake \
     -DgRPC_SSL_PROVIDER=package \
     -DCMAKE_BUILD_TYPE=Release \
     ../..
-make -j4 install/strip
+make -j8 install/strip
 cp -r /opt/grpc/third_party/googletest/googletest/include/gtest \
     "$SDKTARGETSYSROOT"/usr/include
 EOF