acinclude.m4 patch for building blcr 0.8.6 b4 on CentOS 7.3

1106,1107c1106,1107
<       CR_KSYM_PATTERN_DATA=['[bBdDgGrRsStTvV] ']
<       CR_KSYM_PATTERN_CODE=['[dD] ']   dnl Function descriptor is data
---
>       CR_KSYM_PATTERN_DATA=['[bBdDgGrRsStTvVwW] ']
>       CR_KSYM_PATTERN_CODE=['[dDwW] ']   dnl Function descriptor is data
1110,1111c1110,1111
<       CR_KSYM_PATTERN_DATA=['[bBdDgGrRsStTvV] ']
<       CR_KSYM_PATTERN_CODE=['[tT] ']
---
>       CR_KSYM_PATTERN_DATA=['[bBdDgGrRsStTvVwW] ']
>       CR_KSYM_PATTERN_CODE=['[tTwW] ']
1253c1253
<   if $RPMBUILD -bs 2>&1 | grep 'no spec' >/dev/null 2>/dev/null; then
---
>   if $RPMBUILD --usage 2>&1 | grep buildroot >/dev/null 2>/dev/null; then