Fix several warnings in JSC building for a ARMv7 target
``` webkit/WebKitBuild/Release/JavaScriptCore/PrivateHeaders/JavaScriptCore/ARMv7Assembler.h:1375:49: warning: bitwise operation between different enumeration types ‘JSC::ARMv7Assembler::OpcodeID1’ and ‘JSC::ARMv7Assembler::RegisterID’ {aka ‘JSC::ARMRegisters::RegisterID’} is deprecated [-Wdeprecated-enum-enum-conversion] 1375 | static_cast<uint16_t>(OP_CMP_reg_T2 | left) | ~~~~~~~~~~~~~~^~~~~~ ``` ``` webkit/WebKitBuild/Release/JavaScriptCore/PrivateHeaders/JavaScriptCore/ARMv7Assembler.h:3040:34: warning: bitwise operation between different enumeration types ‘JSC::ARMv7Assembler::OpcodeID1’ and ‘JSC::ARMv7Assembler::RegisterID’ {aka ‘JSC::ARMRegisters::RegisterID’} is deprecated [-Wdeprecated-enum-enum-conversion] 3040 | m_buffer.putShort(op | reg); | ``` ...
Pull request: https://github.com/WebKit/WebKit/pull/6562
<rdar://problem/102633427>