extra/curl: fix permissions for curl-config

while there, also fix add some style fixes and set correct
makedepends

extra/curl/APKBUILD

-# Maintainer:Carlo Landmeter
+# Maintainer: Carlo Landmeter <clandmeter at gmail.com>
 pkgname=curl
 pkgver=7.19.2
-pkgrel=0
+pkgrel=1
 pkgdesc="An URL retrival utility and library"
 url="http://curl.haxx.se"
 license="MIT"
 depends="zlib uclibc openssl"
+makedepends="zlib-dev openssl-dev"
 source="http://curl.haxx.se/download/$pkgname-$pkgver.tar.bz2"
 
 subpackages="$pkgname-doc $pkgname-dev"
 
 build() {
-	cd $startdir/src/$pkgname-$pkgver
-	./configure --prefix=/usr --mandir=/usr/share/man --without-libidn --disable-ldap
+	cd "$srcdir/$pkgname-$pkgver"
+	./configure --prefix=/usr \
+		--mandir=/usr/share/man \
+		--without-libidn \
+		--disable-ldap
 	make || return 1
-	make prefix=$startdir/pkg/usr mandir=$startdir/pkg/usr/share/man install
+	make DESTDIR="$pkgdir" install
+
+	# fix permissions for curl-config
+	chmod +x "$pkgdir"/usr/bin/curl-config
 }
 
 md5sums="3a461b145a4a31fe7d5a44684e7fbdbc  curl-7.19.2.tar.bz2"