Bump gettext, libcurl and SDL2 versions

SDL2.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -e
 
-SDL2_VERSION=2.26.5
+SDL2_VERSION=2.28.0
 
 . sdk.sh
 
@@ -24,7 +24,7 @@ cmake .. -DANDROID_STL="c++_static" \
     -DANDROID_PLATFORM="$API" \
     -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_C_FLAGS="$CFLAGS" \
-    -DCMAKE_CXX_FLAGS="$CXXFLAGS -fPIC" \
+    -DCMAKE_CXX_FLAGS="$CXXFLAGS" \
     -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake" \
     -DLIBTYPE=STATIC
 

gettext.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 . sdk.sh
-GETTEXT_VERSION=0.21.1
+GETTEXT_VERSION=0.22
 
 mkdir -p output/gettext/lib/$TARGET_ABI
 mkdir -p deps; cd deps

libcurl.sh

@@ -1,7 +1,7 @@
 #!/bin/bash -e
 
 . sdk.sh
-CURL_VERSION=8.1.1
+CURL_VERSION=8.1.2
 
 export ANDR_ROOT=$(pwd)
 

sdk.sh

@@ -38,7 +38,7 @@ case "$ARCH" in
 esac
 
 export API=21
-export CFLAGS="-fvisibility=hidden -fexceptions -D__ANDROID_MIN_SDK_VERSION__=$API"
+export CFLAGS="-fvisibility=hidden -fvisibility-inlines-hidden -fexceptions -D__ANDROID_MIN_SDK_VERSION__=$API"
 export CXXFLAGS="$CFLAGS -frtti"
 export NATIVE_API_LEVEL="android-$API"