build seems to be racy now, removing parallel build for now

bc.spec

@@ -1,7 +1,7 @@
 Summary: GNU's bc (a numeric processing language) and dc (a calculator)
 Name: bc
 Version: 1.07
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: GPLv2+
 URL: http://www.gnu.org/software/bc/
 Group: Applications/Engineering
@@ -28,7 +28,7 @@ if you would like to use its text mode calculator.
 
 %build
 %configure --with-readline
-make %{?_smp_mflags}
+make
 
 %install
 make install DESTDIR=$RPM_BUILD_ROOT
@@ -60,6 +60,9 @@ fi
 %{_infodir}/*
 
 %changelog
+* Mon May 15 2017 Ondrej Vasik <ovasik@redhat.com> - 1.07-2
+- build seems to be racy now, removing parallel build for now
+
 * Wed May 10 2017 Ondrej Vasik <ovasik@redhat.com> - 1.07-1
 - new upstream version 1.07, dropped patches already appllied
   in usptream version