perf build: Add missing FEATURE_CHECK_LDFLAGS-libcrypto

When the libcrypto feature test was added we forgot to add its
FEATURE_CHECK_LDFLAGS pointing to the library needed to link with the
test-all.bin feature test fast path binary, so even when it was
introduced we got this:

  $ cat /tmp/build/perf/feature/test-all.make.output
  /usr/bin/ld: /tmp/ccjKeJJU.o: in function `main_test_libcrypto':
  /home/acme/git/perf/tools/build/feature/test-libcrypto.c:10: undefined reference to `MD5_Init'
  /usr/bin/ld: /home/acme/git/perf/tools/build/feature/test-libcrypto.c:11: undefined reference to `MD5_Update'
  /usr/bin/ld: /home/acme/git/perf/tools/build/feature/test-libcrypto.c:12: undefined reference to `MD5_Final'
  /usr/bin/ld: /home/acme/git/perf/tools/build/feature/test-libcrypto.c:14: undefined reference to `SHA1'
  collect2: error: ld returned 1 exit status
  $ cat /tmp/build/perf/feature/test-libcrypto.
  test-libcrypto.bin          test-libcrypto.d            test-libcrypto.make.output
  $ cat /tmp/build/perf/feature/test-libcrypto.make.output
  $

Fix it, so that we keep the fast path, which, at this point, will fail
with the unwind-ARCH feature tests, that will be fixed in a followup
patch:

  $ make -C tools/perf O=/tmp/build/perf
  ...                     libcrypto: [ on  ]
   <SNIP>
  $ cat /tmp/build/perf/feature/test-all.make.output
  $ ldd /tmp/build/perf/feature/test-all.bin | grep libcrypto
	libcrypto.so.1.1 => /lib64/libcrypto.so.1.1 (0x00007f9892805000)
  $
  $ grep libcrypto /tmp/build/perf/FEATURE-DUMP
  feature-libcrypto=1
  $

With the unwind-ARCH tests fixed, we now finally manage to get
test-all.bin built and linked with the features it tests, among them the
ones fixed in this patchkit:

  $ ldd /tmp/build/perf/feature/test-all.bin  | egrep 'unwind|crypto'
	libcrypto.so.1.1 => /lib64/libcrypto.so.1.1 (0x00007f95cf2b8000)
	libunwind-x86_64.so.8 => /lib64/libunwind-x86_64.so.8 (0x00007f95cf294000)
	libunwind.so.8 => /lib64/libunwind.so.8 (0x00007f95cf278000)
  $

Cc: Adrian Hunter <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Carl Love <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John McCutchan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Pawel Moll <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Sonny Rao <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Sukadev Bhattiprolu <[email protected]>
Fixes: 8ee4646038e4 ("perf build: Add libcrypto feature detection")
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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