Copy condition->expr map when inlining [PR114599]

Copy condition->expr map when inlining [PR114599]

When a function is tree-inlined, copy the condition -> expression mapping
from the inlined function into the caller, shifted so uids are not
mixed.  Tree inlining was always problematic under condition coverage -
either through a nullptr dereference (triggered by the test case), or
through quietly mixing caller conditions with the callee conditions.

	PR middle-end/114599

gcc/ChangeLog:

	* tree-inline.cc (add_local_variables): Copy cond_uids mappings.

gcc/testsuite/ChangeLog:

	* gcc.misc-tests/gcov-pr114599.c: New test.