Fixed Android build failure

Added missing .c_str() to convert the string object
into a character string.

Change-Id: I3810f67a2462f7717fdec61679e09a191b043adf
Reviewed-on: https://swiftshader-review.googlesource.com/4878
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/OpenGL/libGLESv2/Program.cpp b/src/OpenGL/libGLESv2/Program.cpp
index 2b49b4e..08a2358 100644
--- a/src/OpenGL/libGLESv2/Program.cpp
+++ b/src/OpenGL/libGLESv2/Program.cpp
@@ -1379,7 +1379,7 @@
 					{

 						if(!linkedAttribute[location + i].name.empty())

 						{

-							appendToInfoLog("Attribute '%s' aliases attribute '%s' at location %d", attribute->name.c_str(), linkedAttribute[location].name, location);

+							appendToInfoLog("Attribute '%s' aliases attribute '%s' at location %d", attribute->name.c_str(), linkedAttribute[location].name.c_str(), location);

 							return false;

 						}

 					}