Disable llvm-lines testing of regex-1.5.5 on CI.

It hasn't worked for months, which means the "Test profiling" CI job has
been failing all that time. In lieu of a proper fix, let's disable this
small part of "Test profiling" to get it green again.

Author: nnethercote

ci/check-profiling.sh

@@ -137,6 +137,9 @@ test ! -s results/eprintln-Test-helloworld-Check-Full
 # Including both `helloworld` and `regex-1.5.5` benchmarks, as they exercise the
 # zero dependency and the greater than zero dependency cases, respectively, the
 # latter of which has broken before.
+#
+# XXX: `regex-1.5.5` is currently disabled because it's failing on CI, even
+# though it works locally. #1537 is the issue for this.
 RUST_BACKTRACE=1 RUST_LOG=raw_cargo_messages=trace,collector=debug,rust_sysroot=debug \
     cargo run -p collector --bin collector -- \
     profile_local llvm-lines $bindir/rustc \
@@ -147,8 +150,8 @@ RUST_BACKTRACE=1 RUST_LOG=raw_cargo_messages=trace,collector=debug,rust_sysroot=
         --scenarios Full
 test -f results/ll-Test-helloworld-Debug-Full
 grep -q "Lines.*Copies.*Function name" results/ll-Test-helloworld-Debug-Full
-test -f results/ll-Test-regex-1.5.5-Debug-Full
-grep -q "Lines.*Copies.*Function name" results/ll-Test-regex-1.5.5-Debug-Full
+#test -f results/ll-Test-regex-1.5.5-Debug-Full
+#grep -q "Lines.*Copies.*Function name" results/ll-Test-regex-1.5.5-Debug-Full
 
 # llvm-ir. `Debug` not `Check` because it works better that way.
 RUST_BACKTRACE=1 RUST_LOG=raw_cargo_messages=trace,collector=debug,rust_sysroot=debug \