fix initWithData:encoding constructor in NSMutableString_unicodePtr
fix initWithData:encoding constructor in NSMutableString_unicodePtr

gemu2015/cocotron-sierra,ruppmatt/cocotron,cneira/cocotron,JackLian/cocotron,cjwl/cocotron,cjwl/cocotron,gemu2015/cocotron-sierra,cyclaero/cocotron,yuhangwang/cocotron,cneira/cocotron,crystax/android-vendor-cocotron,guestOS/guestOS,JackLian/cocotron,ruppmatt/cocotron,yuhangwang/cocotron,Suninus/cocotron,cneira/cocotron,gemu2015/cocotron-sierra,guestOS/guestOS,gemu2015/cocotron-sierra,JackLian/cocotron,ruppmatt/cocotron,Suninus/cocotron,Suninus/cocotron,crystax/android-vendor-cocotron,cyclaero/cocotron,guestOS/guestOS,cyclaero/cocotron,Suninus/cocotron,ruppmatt/cocotron,yuhangwang/cocotron,cjwl/cocotron,cjwl/cocotron,cneira/cocotron,yuhangwang/cocotron,crystax/android-vendor-cocotron,JackLian/cocotron,guestOS/guestOS,cyclaero/cocotron,crystax/android-vendor-cocotron