Revert "symbols: replace pcre lib with a Go function"
Created by: chrismwendt
Reverts sourcegraph/sourcegraph#25374
Somehow the symbols Docker image is missing libs:
/ # ldd /usr/local/bin/symbols
/lib64/ld-linux-x86-64.so.2 (0x7f71626df000)
libpthread.so.0 => /lib64/ld-linux-x86-64.so.2 (0x7f71626df000)
libdl.so.2 => /lib64/ld-linux-x86-64.so.2 (0x7f71626df000)
libc.so.6 => /lib64/ld-linux-x86-64.so.2 (0x7f71626df000)
Error relocating /usr/local/bin/symbols: __vfprintf_chk: symbol not found
Error relocating /usr/local/bin/symbols: __memcpy_chk: symbol not found
Error relocating /usr/local/bin/symbols: __memset_chk: symbol not found
Error relocating /usr/local/bin/symbols: __fprintf_chk: symbol not found
Error relocating /usr/local/bin/symbols: fcntl64: symbol not found
I'll fix this and merge merge the original PR again.
Slack context https://sourcegraph.slack.com/archives/CHXHX7XAS/p1632759056115100?thread_ts=1632758739.113800&cid=CHXHX7XAS