CMake: Adjust abicheck locations

Look in build/apt-pkg and build/apt-inst instead of build/bin.

Gbp-Dch: ignore

abicheck/apt_build.xml.in

@@ -7,5 +7,6 @@
  </headers>
    
  <libs>
-  @build_path@/bin/
+  @build_path@/apt-pkg/
+  @build_path@/apt-inst/
  </libs>

abicheck/run_abi_test

@@ -8,7 +8,7 @@ if [ ! -d ../build ]; then
 	exit 1
 fi
 
-if command -v abi-compliance-checker 2>/dev/null >&2; then
+if ! command -v abi-compliance-checker 2>/dev/null >&2; then
 	echo "Please install the 'abi-compliance-checker' package"
 	exit 1
 fi