gnu: bwa,bwa-pssm: Improve package style.

* gnu/packages/bioinformatics.scm (bwa)[arguments]: Use G-expression.
(bwa-pssm)[arguments]: Use G-expression.

Change-Id: I63dd0f13f337fbf84967f1ef1b6332ce3391ae97

gnu/packages/bioinformatics.scm

@@ -4271,11 +4271,11 @@ splice junctions between exons.")
                 "1vf3iwkzxqkzhcfz2q3qyvcv3jrvbb012qy21pfgjl8lv20ywfr1"))))
     (build-system gnu-build-system)
     (arguments
-     `(#:tests? #f ;no "check" target
-       #:make-flags (list "CFLAGS=-fcommon"
-                          (string-append "CC=" ,(cc-for-target)))
+     (list #:tests? #f ;no "check" target
+           #:make-flags #~(list "CFLAGS=-fcommon"
+                                (string-append "CC=" #$(cc-for-target)))
            #:phases
-       (modify-phases %standard-phases
+           #~(modify-phases %standard-phases
                (replace 'install
                  (lambda* (#:key outputs #:allow-other-keys)
                    (let* ((out (assoc-ref outputs "out"))
@@ -4306,7 +4306,8 @@ and more accurate.  BWA-MEM also has better performance than BWA-backtrack for
     (license license:gpl3+)))
 
 (define-public bwa-pssm
-  (package (inherit bwa)
+  (package
+    (inherit bwa)
     (name "bwa-pssm")
     (version "0.5.11")
     (source (origin
@@ -4321,8 +4322,8 @@ and more accurate.  BWA-MEM also has better performance than BWA-backtrack for
     (build-system gnu-build-system)
     (arguments
      (substitute-keyword-arguments (package-arguments bwa)
-       ((#:phases phases '%standard-phases)
-        `(modify-phases ,phases
+       ((#:phases phases #~%standard-phases)
+        #~(modify-phases #$phases
             (add-after 'unpack 'patch-C-error
               (lambda _
                 (substitute* "pssm.c"