fix [NSString getLineStart:end:contentsEnd:forRange:] if first line is empty
fix [NSString getLineStart:end:contentsEnd:forRange:] if first line is empty

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