location.hh might not be found during the build, potential missing dependency

[mbautin]

Jira Link: DB-4878
Saw this on the 2.6 branch when trying to build yb-admin by itself:
./yb_build.sh release --target yb-admin --save-log --sccl

The error is as follows and it is fully repeatable:

( cd "/mnt/ramdisk/yugabyte-db/build/release-gcc-dynamic-ninja" && PATH=/opt/yb-build/brew/linuxbrew-20181203T161736v9/bin:$PATH YB_THIRDPARTY_DIR=/opt/yb-build/thirdparty/yugabyte-db-thirdparty-v2.6-20210916160338-07ec4592b1-centos7-linuxbrew /opt/yb-build/brew/linuxbrew-20181203T161736v9/bin/g++ -Dql_util_EXPORTS -Isrc -I../../ent/src -I../../src -Ipostgres/include -isystem /opt/yb-build/thirdparty/yugabyte-db-thirdparty-v2.6-20210916160338-07ec4592b1-centos7-linuxbrew/installed/common/include -isystem /opt/yb-build/thirdparty/yugabyte-db-thirdparty-v2.6-20210916160338-07ec4592b1-centos7-linuxbrew/installed/uninstrumented/include -Werror -fno-strict-aliasing -msse4.2 -Wall -Wno-sign-compare -Wno-deprecated -Winvalid-pch -pthread -DBOOST_BIND_NO_PLACEHOLDERS -DBOOST_UUID_RANDOM_PROVIDER_FORCE_POSIX -DROCKSDB_PLATFORM_POSIX -DBOOST_ERROR_CODE_HEADER_ONLY -march=ivybridge -mcx16 -DYB_COMPILER_TYPE=gcc -DYB_COMPILER_VERSION=5.5.0 -DROCKSDB_LIB_IO_POSIX -DSNAPPY -DZLIB -mno-avx -mno-bmi -mno-bmi2 -mno-fma -D__STDC_FORMAT_MACROS -Wno-deprecated-declarations -DGFLAGS=gflags -Wnon-virtual-dtor -Werror=enum-compare -Werror=reorder -Werror=switch -Werror=return-type -Werror=non-virtual-dtor -DYB_HEADERS_NO_STUBS=1 -O3 -g -DNDEBUG -fno-omit-frame-pointer -mno-abm -mno-movbe -fPIC -DTCMALLOC_ENABLED -fPIC -std=gnu++14 -MD -MT src/yb/yql/cql/ql/util/CMakeFiles/ql_util.dir/cql_message.cc.o -MF src/yb/yql/cql/ql/util/CMakeFiles/ql_util.dir/cql_message.cc.o.d -o src/yb/yql/cql/ql/util/CMakeFiles/ql_util.dir/cql_message.cc.o -c ../../src/yb/yql/cql/ql/util/cql_message.cc )  # Compiler exit code: 1.

/-------------------------------------------------------------------------------
| COMPILATION FAILED
|-------------------------------------------------------------------------------
In file included from src/yb/yql/cql/ql/parser/parse_context.h:21:0,
                 from src/yb/yql/cql/ql/parser/parser.h:23,
                 from src/yb/yql/cql/ql/ql_processor.h:26,
                 from src/yb/yql/cql/cqlserver/cql_processor.h:30,
                 from src/yb/yql/cql/ql/util/cql_message.cc:26:
src/yb/yql/cql/ql/parser/location.h:24:44: fatal error: yb/yql/cql/ql/parser/location.hh: No such file or directory
compilation terminated.

Input files:
  src/yb/yql/cql/ql/util/CMakeFiles/ql_util.dir/cql_message.cc.o
  src/yb/yql/cql/ql/util/cql_message.cc
Output file (from -o): src/yb/yql/cql/ql/util/CMakeFiles/ql_util.dir/cql_message.cc.o
\-------------------------------------------------------------------------------