Fix audit warnings

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/aalib.rb

@@ -13,8 +13,8 @@ class Aalib < Formula
   if MacOS.xcode_version >= "4.3"
     # remove the autoreconf if possible, no comment provided about why it is there
     # so we have no basis to make a decision at this point.
-    depends_on "automake"
-    depends_on "libtool"
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
   end
 
   def install

Formula/arabica.rb

@@ -8,8 +8,8 @@ class Arabica < Formula
   if MacOS.xcode_version >= "4.3"
     # remove the autoreconf if possible, no comment provided about why it is there
     # so we have no basis to make a decision at this point.
-    depends_on "automake"
-    depends_on "libtool"
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
   end
 
   def install

Formula/blitz.rb

@@ -8,12 +8,12 @@ class Blitz < Formula
   head 'http://blitz.hg.sourceforge.net:8000/hgroot/blitz/blitz', :using => :hg
 
   if ARGV.build_head? and MacOS.xcode_version >= "4.3"
-    depends_on "automake"
-    depends_on "libtool"
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
   end
 
   def install
-    system "/usr/bin/autoreconf", "-fi" if ARGV.build_head?
+    system "autoreconf", "-fi" if ARGV.build_head?
 
     system "./configure", "--disable-debug",
                           "--disable-dependency-tracking",

Formula/logstalgia.rb

@@ -14,8 +14,8 @@ class Logstalgia < Formula
   depends_on 'pcre'
 
   if ARGV.build_head? and MacOS.xcode_version >= "4.3"
-    depends_on "automake"
-    depends_on "libtool"
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
   end