graw: add symlinks to shader test directories

diff --git a/src/gallium/tests/graw/fragment-shader b/src/gallium/tests/graw/fragment-shader
new file mode 120000 (symlink)
index 0000000..c7dd0b7
--- /dev/null
+++ b/src/gallium/tests/graw/fragment-shader
@@ -0,0 +1 @@
+../python/tests/regress/fragment-shader
\ No newline at end of file

diff --git a/src/gallium/tests/graw/vertex-shader b/src/gallium/tests/graw/vertex-shader
new file mode 120000 (symlink)
index 0000000..7b216e8
--- /dev/null
+++ b/src/gallium/tests/graw/vertex-shader
@@ -0,0 +1 @@
+../python/tests/regress/vertex-shader
\ No newline at end of file