Sparc: Improve SETHI and R_SPARC_DISP32 tests
* adjustFixupValue is called even when a R_SPARC_HIX22/R_SPARC_LOX10
relocation is generated. This will be fixed shortly.
* Enhanced the %h44 test to show that we don't check overflow.
* Test R_SPARC_DISP32 in .gcc_except_table and .eh_frame . The original
support did not test -filetype=obj output.
