Move build/ to build_gyp/.

build/gyp_pdfium

Index: build/gyp_pdfium
diff --git a/build/gyp_pdfium b/build/gyp_pdfium
index fca2ca39b69977b01b105b53bf62271a880bd7f4..3dbbbeea75d8b353a7882077c9f1569aa967e710 100755
--- a/build/gyp_pdfium
+++ b/build/gyp_pdfium
@@ -14,7 +14,7 @@ import sys
 script_dir = os.path.dirname(os.path.realpath(__file__))
 pdfium_root = os.path.abspath(os.path.join(script_dir, os.pardir))
 
-sys.path.insert(0, os.path.join(pdfium_root, 'build', 'gyp', 'pylib'))
+sys.path.insert(0, os.path.join(pdfium_root, 'build_gyp', 'gyp', 'pylib'))
 import gyp
 
 
@@ -27,10 +27,10 @@ def run_gyp(args):
 
 def main():
   args = sys.argv[1:]
-  args.append(os.path.join(script_dir, 'all.gyp'))
+  args.append(os.path.join(pdfium_root, 'build_gyp', 'all.gyp'))
 
   args.append('-I')
-  args.append(os.path.join(pdfium_root, 'build', 'standalone.gypi'))
+  args.append(os.path.join(pdfium_root, 'build_gyp', 'standalone.gypi'))
 
   args.extend(['-D', 'gyp_output_dir=out'])