buildsystem: pass the library/apk ABI variant name as a property to medialibrary

It's lowercase "all" by default.

It's only set to a specialized value when building libvlc and medialib libraries.

buildsystem/compile.sh

@@ -380,7 +380,8 @@ if [ "$BUILD_LIBVLC" = 1 ];then
     GRADLE_ABI=$GRADLE_ABI ./gradlew ${gradle_prop} -p ${VLC_LIBJNI_PATH}/libvlc assemble${BUILDTYPE}
     RUN=0
 elif [ "$BUILD_MEDIALIB" = 1 ]; then
-    GRADLE_ABI=$GRADLE_ABI ./gradlew ${gradle_prop} -p medialibrary assemble${BUILDTYPE}
+    gradle_prop="$gradle_prop -PvlcLibVariant=$GRADLE_ABI"
+    ./gradlew ${gradle_prop} -p medialibrary assemble${BUILDTYPE}
     RUN=0
 else
     if [ "$TEST" = 1 ] || [ "$RUN" = 1 ]; then

buildsystem/gitlab/.gitlab-ci.yml

@@ -448,7 +448,7 @@ publish_libs:
         - git config --global --add safe.directory $CI_PROJECT_DIR/libvlcjni
         - ./buildsystem/compile.sh --init -b
         - GRADLE_ABI=ALL ./gradlew -Dmaven.repo.local=$M2_REPO -p libvlcjni publishToMavenLocal
-        - GRADLE_ABI=ALL ./gradlew -Dmaven.repo.local=$M2_REPO -p medialibrary publishToMavenLocal
+        - ./gradlew -Dmaven.repo.local=$M2_REPO -p medialibrary publishToMavenLocal
     artifacts:
         name: "${CI_COMMIT_TAG}.dbg"
         paths:
@@ -486,7 +486,7 @@ publish_libs-v4:
         - git config --global --add safe.directory $CI_PROJECT_DIR/libvlcjni
         - ./buildsystem/compile.sh --init -b -vlc4
         - GRADLE_ABI=ALL ./gradlew -Dmaven.repo.local=$M2_REPO -PforceVlc4=true -p libvlcjni publishToMavenLocal
-        - GRADLE_ABI=ALL ./gradlew -Dmaven.repo.local=$M2_REPO -PforceVlc4=true -p medialibrary publishToMavenLocal
+        - ./gradlew -Dmaven.repo.local=$M2_REPO -PforceVlc4=true -p medialibrary publishToMavenLocal
     artifacts:
         name: "${CI_COMMIT_TAG}.dbg"
         paths:

medialibrary/build.gradle

@@ -23,7 +23,7 @@
 apply plugin: 'com.android.library'
 apply plugin: "com.vanniktech.maven.publish"
 
-def abi = System.getenv('GRADLE_ABI')?.toLowerCase()
+def abi = project.hasProperty('vlcLibVariant') ? project.getProperty('vlcLibVariant') : 'all'
 ext {
     library_version = "$rootProject.ext.medialibraryVersion"
 }