bc: Rebuild with readline-7

bc/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=bc
 pkgver=1.06
-pkgrel=2
+pkgrel=3
 pkgdesc="An arbitrary precision calculator language"
 arch=('i686' 'x86_64')
 url="https://www.gnu.org/software/bc"
@@ -20,7 +20,7 @@ prepare () {
 }
 
 build () {
-  [ -d ${srcdir}/build-${CHOST} ] && rm -rf ${srcdir}/build-${CHOST}
+  [[ -d ${srcdir}/build-${CHOST} ]] && rm -rf ${srcdir}/build-${CHOST}
   mkdir ${srcdir}/build-${CHOST} && cd ${srcdir}/build-${CHOST}
   
   ../${pkgname}-${pkgver}/configure \