Upgrading Mesa to 9.0.3

third_party/mesa/README.txt

Index: third_party/mesa/README.txt
diff --git a/third_party/mesa/README.txt b/third_party/mesa/README.txt
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+Compilation has a few phases:
+
+1. Generate the header and dispatch source files that have to match the GL api.
+   These read in a description of the GL api in the form of XML files. In
+   addition, generate the GLSL parser and lexer using flex and bison. These
+   sources are needed for step 2
+2. Compile everything in src/glsl into a library. This step uses the parser and
+   lexer output.
+3. Compile the compiler (executable) that can create the builtin functions'
+   source file.  Note that this step uses builtin_stubs.cpp because we haven't
+   generated the actual builtin functions' source file yet.
+4. Invoke the compiler that we just built to create
+   gen/mesa/builtin_function.cpp
+5. Compile the rest of mesa, using the builtins that we created in step 4. In
+   addition, link in all the files that we've previously compiled in step 2.