Update to latest versions of bx, bimg and bgfx

cmake/3rdparty/astc.cmake

@@ -0,0 +1,19 @@
+# bgfx.cmake - bgfx building in cmake
+# Written in 2017 by Joshua Brookover <joshua.al.brookover@gmail.com>
+
+# To the extent possible under law, the author(s) have dedicated all copyright
+# and related and neighboring rights to this software to the public domain
+# worldwide. This software is distributed without any warranty.
+
+# You should have received a copy of the CC0 Public Domain Dedication along with
+# this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+
+if( TARGET astc )
+	return()
+endif()
+
+file( GLOB ASTC_SOURCES ${BIMG_DIR}/3rdparty/astc/*.cpp ${BIMG_DIR}/3rdparty/astc/*.h )
+
+add_library( astc STATIC ${ASTC_SOURCES} )
+target_include_directories( astc PUBLIC ${BIMG_DIR}/3rdparty )
+set_target_properties( astc PROPERTIES FOLDER "bgfx/3rdparty" )

cmake/bimg.cmake

@@ -9,6 +9,7 @@
 # this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 
 # Third party libs
+include( cmake/3rdparty/astc.cmake )
 include( cmake/3rdparty/edtaa3.cmake )
 include( cmake/3rdparty/etc1.cmake )
 include( cmake/3rdparty/etc2.cmake )
@@ -33,7 +34,7 @@ add_library( bimg STATIC ${BIMG_SOURCES} )
 target_include_directories( bimg PUBLIC ${BIMG_DIR}/include )
 
 # bimg dependencies
-target_link_libraries( bimg bx edtaa3 etc1 etc2 iqa squish nvtt pvrtc )
+target_link_libraries( bimg bx astc edtaa3 etc1 etc2 iqa squish nvtt pvrtc )
 
 # Put in a "bgfx" folder in Visual Studio
 set_target_properties( bimg PROPERTIES FOLDER "bgfx" )