Fix genreating filenames.gypi for static_library build
Fix genreating filenames.gypi for static_library build

jlord/libchromiumcontent,synaptek/libchromiumcontent,hokein/libchromiumcontent,jlord/libchromiumcontent,deepak1556/libchromiumcontent,eric-seekas/libchromiumcontent,bbondy/libchromiumcontent,atom/libchromiumcontent,electron/libchromiumcontent,synaptek/libchromiumcontent,bbondy/libchromiumcontent,adamjgray/libchromiumcontent,electron/libchromiumcontent,zhanggyb/libchromiumcontent,paulcbetts/libchromiumcontent,atom/libchromiumcontent,zhanggyb/libchromiumcontent,brave/libchromiumcontent,eric-seekas/libchromiumcontent,brave/libchromiumcontent,deepak1556/libchromiumcontent,hokein/libchromiumcontent,adamjgray/libchromiumcontent,paulcbetts/libchromiumcontent