Update Makefile to enable static linking for Android builds and add debug symbol stripping to reduce target size

Author: Gioee

Makefile

@@ -82,10 +82,9 @@ else ifeq ($(PLATFORM),android)
     CC = $(BIN)/$(ARCH)-linux-android26-clang
     CXX = $(CC)++
     TARGET := $(DIST_DIR)/ai.so
-    LDFLAGS += -shared
+    LDFLAGS += -static-libstdc++ -shared
     LLAMA_OPTIONS += -DCMAKE_TOOLCHAIN_FILE=$(ANDROID_NDK)/build/cmake/android.toolchain.cmake -DANDROID_ABI=$(if $(filter aarch64,$(ARCH)),arm64-v8a,$(ARCH)) -DANDROID_PLATFORM=android-26 -DCMAKE_C_FLAGS="-march=$(if $(filter aarch64,$(ARCH)),armv8.7a,x86-64)" -DCMAKE_CXX_FLAGS="-march=$(if $(filter aarch64,$(ARCH)),armv8.7a,x86-64)" -DGGML_OPENMP=OFF -DGGML_LLAMAFILE=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON
     WHISPER_OPTIONS += -DCMAKE_TOOLCHAIN_FILE=$(ANDROID_NDK)/build/cmake/android.toolchain.cmake -DANDROID_ABI=$(if $(filter aarch64,$(ARCH)),arm64-v8a,$(ARCH)) -DANDROID_PLATFORM=android-26 -DCMAKE_C_FLAGS="-march=$(if $(filter aarch64,$(ARCH)),armv8.7a,x86-64)" -DCMAKE_CXX_FLAGS="-march=$(if $(filter aarch64,$(ARCH)),armv8.7a,x86-64)" -DGGML_OPENMP=OFF -DGGML_LLAMAFILE=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-
 else ifeq ($(PLATFORM),ios)
     TARGET := $(DIST_DIR)/ai.dylib
     SDK := -isysroot $(shell xcrun --sdk iphoneos --show-sdk-path) -miphoneos-version-min=14.0
@@ -131,6 +130,10 @@ ifeq ($(PLATFORM),windows)
     # Generate import library for Windows
 	dlltool -D $@ -d $(DEF_FILE) -l $(DIST_DIR)/ai.lib
 endif
+ifeq ($(PLATFORM),android)
+    # Android strip debug symbols
+	$(BIN)/llvm-strip --strip-unneeded $@
+endif
 
 # Object files
 $(BUILD_DIR)/%.o: %.c