vbo: whitespace fixes and reformatting in vbo_exec_api.c
vbo: whitespace fixes and reformatting in vbo_exec_api.c

Reviewed-by: Charmaine Lee <67ce69700661ea856134ddb10419a330e5f037d7@vmware.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler