import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/cairo/win32-inline-cpp-keyword.patch

@@ -0,0 +1,24 @@
+diff --git a/gfx/cairo/cairo/src/cairo-compiler-private.h b/gfx/cairo/cairo/src/cairo-compiler-private.h
+--- a/gfx/cairo/cairo/src/cairo-compiler-private.h
++++ b/gfx/cairo/cairo/src/cairo-compiler-private.h
+@@ -205,18 +205,20 @@
+ #if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
+ #define snprintf _snprintf
+ #define popen _popen
+ #define pclose _pclose
+ #define hypot _hypot
+ #endif
+ 
+ #ifdef _MSC_VER
++#ifndef __cplusplus
+ #undef inline
+ #define inline __inline
++#endif
+ 
+ /* there are currently linkage problems that arise when trying to include intrin.h in c++:
+  * D:\sdks\v7.0\include\winnt.h(3674) : error C2733: second C linkage of overloaded function '_interlockedbittestandset' not allowed
+  * so avoid defining ffs in c++ code for now */
+ #ifndef  __cplusplus
+ /* Add a definition of ffs */
+ #include <intrin.h>
+ #pragma intrinsic(_BitScanForward)