glsl/tests: suffix .sh/.py files as applicable

This makes it easier/clearer as to:
 - if the file should have the execute bit set (.py should not)
 - do we need the shebang in the first place and if so what it should be

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

src/compiler/glsl/tests/compare_ir.py

@@ -34,7 +34,7 @@ import tempfile
 from sexps import *
 
 if len(sys.argv) != 3:
-    print 'Usage: compare_ir <file1> <file2>'
+    print 'Usage: python2 ./compare_ir.py <file1> <file2>'
     exit(1)
 
 with open(sys.argv[1]) as f:

src/compiler/glsl/tests/optimization-test.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 
 if [ ! -z "$srcdir" ]; then
-   compare_ir=`pwd`/tests/compare_ir
+   compare_ir=`pwd`/tests/compare_ir.py
 else
-   compare_ir=./compare_ir
+   compare_ir=./compare_ir.py
 fi
 
 total=0