build: allow building crossgcc when .config exists

Under some circumstances the coreboot toolchain test prevented
building crossgcc, which is counter-productive: If a .config file
exists but no suitable .xcompile.

Don't assume anything about the tree when building crossgcc or
crosstools targets.

Change-Id: I4d6e7a88908dc967342daf30df0fcbcc269ae63d
Signed-off-by: Patrick Georgi <>
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <>
Reviewed-by: Martin Roth <>
1 file changed