Linker: Allow merging H extension
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Because riscv_merge_std_ext function did not merge the 'H' extension, linked executables lacked 'H' extension when multiple objects are merged. This issue is found while building OpenSBI with 'H' extension (resulting ELF files did not contain "h1p0" in "Tag_RISCV_arch" even if *all* linked object files contained it). This commit adds 'h' to standard_exts variable to merge 'H' extension. bfd/ChangeLog: * elfnn-riscv.c (riscv_merge_std_ext): Add 'H' extension merging.
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Wiki Page (details): https://github.com/a4lg/binutils-gdb/wiki/riscv_ld_merge_h_ext