patch to support -frepo under AIX

[David Edelsohn]

	Is the string that you are looking for ("Undefined symbol: ") very
consistent across all SVR4 linkers?  I was just in the process of writing
a similar patch but I was going to look for "ndefined" (and possible
"nresolved") and then look for the symbol name at the end of the line
instead of the specific string with the symbol name following the colon.

	I would suggest at least modify the search to be the string
"ndefined symbol: " to make the test less case-sensative.  A similar
approach is used just 20 lines further down in the function.

	Any comments about accepting more failure strings ("ndefined" and
"nresolvd").  Also, any comments about expecting the symbol name at the
end of the line instead of after the ": " or trying both?

Thanks, David