public boolean isCommon() {
		return st_shndx == ElfSectionHeaderConstants.SHN_COMMON;
	}
The symbol labels a common block that has not yet been allocated. The symbol's value
gives alignment constraints, similar to a section's sh_addralign member. That is, the
link editor will allocate the storage for the symbol at an address that is a multiple of
st_value. The symbol's size tells how many bytes are required.
@return true if this is a common symbol
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/ElfSymbol.java