Make DllMain have C linkage.

src/common/version.h

 #define MAJOR_VERSION 1
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 1305
+#define BUILD_REVISION 1306
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/libEGL/main.cpp

@@ -12,7 +12,7 @@
 
 static DWORD currentTLS = TLS_OUT_OF_INDEXES;
 
-BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
+extern "C" BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
 {
     switch (reason)
     {

src/libGLESv2/main.cpp

 //
-// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
@@ -16,7 +16,7 @@
 
 static DWORD currentTLS = TLS_OUT_OF_INDEXES;
 
-BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
+extern "C" BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
 {
     switch (reason)
     {