gnu: libpepadapter: Re-enable release build.

The way, release builds (= non-debug builds) are build changed somewhen.

pEp/nightly.scm

@@ -190,7 +190,6 @@ privacy).")
     (arguments
      '(#:test-target "test"
        #:tests? #f ;; building the tests fails
-       #:make-flags '("NDEBUG=1") ; release build
        #:phases
        (modify-phases %standard-phases
          (replace 'configure
@@ -205,8 +204,12 @@ privacy).")
 PREFIX=~a
 ENGINE_LIB_PATH=~a/lib
 ENGINE_INC_PATH=~a/include
-" out engine engine))))
-	   #t)))))
+" out engine engine)))
+               ;; To actually disable debug build, be need to tweak another
+               ;; file.
+               (substitute* "Makefile.conf"
+                 (("^DEBUG=.*" _) "DEBUG="))
+               #t))))))
     (inputs
      `(("pep-engine" ,pep-engine)
        ("util-linux" ,util-linux "lib"))) ;; uuid.h