7141242: build-infra merge: Rename CPP->CXX and LINK->LD Summary: Cleaned up make variables for compilers and linker to consistently use CXX for C++ compiler, CC for C compiler and LD for linker. Reviewed-by: dholmes, ohrstrom

os_family = solaris+
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arch = x86+
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arch_model = x86_32+
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os_arch = solaris_x86+
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os_arch_model = solaris_x86_32+
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lib_arch = i386+
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compiler = sparcWorks+
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sysdefs = -DSOLARIS -DSPARC_WORKS -DIA32+
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