Move scriptc to script_api/include.

Part 1 of the directory re-organization.  We're renaming the "api" directory
to "script_api" directory to distinguish between our control api (java or c++)
and our script api.

We're also moving the scriptc directory under that newly renamed directory,
and change its name to the more appropriate "include".

Test: scriptc/generate.sh
Test: compiled ImageProcessing_jb

Change-Id: I00c3bbf5728b652d1541ebe4123717f6ab639f09
diff --git a/build_rs.py b/build_rs.py
index 41fe142..830d4d6 100755
--- a/build_rs.py
+++ b/build_rs.py
@@ -249,7 +249,7 @@
     # Copy RS runtime headers.
     headers_dst_base = os.path.join(install_dir, 'platform', 'rs')
 
-    headers_src = android_path('frameworks/rs/scriptc')
+    headers_src = android_path('frameworks/rs/script_api/include')
     headers_dst = os.path.join(headers_dst_base, 'scriptc')
     install_directory(headers_src, headers_dst)