Rename libkeymaster to libkeymaster_staging

Fix a build breakage by renaming libkeymaster to
libkeymaster_staging. fugu's vendor tree already had
a libkeymaster.so which masked system/keymaster/libkeymaster.

Bug: 37997750
Change-Id: Iead014db3f3d841f08c8072b0493ec9fd7a05055
1 file changed