Switch the AppImage building over to gcc from clang

Turns out the current version of clang doesn't support the [[likely]] and [[unlikely]] attributes, so to ensure good performance, we'll be switching to gcc, at least for now.

.travis.yml

@@ -6,6 +6,7 @@ jobs:
           env:
             - NAME="Linux build"
             - COMPILER="gcc"
+            - DEPLOY_APPIMAGE="true"
           services: docker
           cache: ccache
           compiler: gcc
@@ -16,7 +17,6 @@ jobs:
           env:
             - NAME="Linux build"
             - COMPILER="clang"
-            - DEPLOY_APPIMAGE="true"
           services: docker
           cache: ccache
           compiler: clang

3rdparty/CMakeLists.txt

@@ -337,10 +337,10 @@ if(USE_FAUDIO)
 	if (NOT SDL2_FOUND OR SDL2_VERSION VERSION_LESS 2.0.9)
 		message("-- RPCS3: FAudio requires SDL 2.0.9 or newer.")
 	else()
-	set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared library")
-	add_subdirectory(FAudio EXCLUDE_FROM_ALL)
-	target_compile_definitions(FAudio INTERFACE -DHAVE_FAUDIO)
-	set(FAUDIO_TARGET FAudio)
+		set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared library")
+		add_subdirectory(FAudio EXCLUDE_FROM_ALL)
+		target_compile_definitions(FAudio INTERFACE -DHAVE_FAUDIO)
+		set(FAUDIO_TARGET FAudio)
 	endif()
 endif()