Enable armv7 (!1730)

I need to do some more work on pmaports in order for this to actually
be useful.

pmb/config/__init__.py

@@ -156,7 +156,7 @@ apkindex_retention_time = 4
 # specify architectures supported by Alpine here. Fro cross-compiling,
 # we need to generate the "musl-$ARCH", "binutils-$ARCH" and "gcc-$ARCH"
 # packages (use "pmbootstrap aportgen musl-armhf" etc.).
-build_device_architectures = ["armhf", "aarch64", "x86_64", "x86"]
+build_device_architectures = ["armhf", "armv7", "aarch64", "x86_64", "x86"]
 
 # Packages, that will be installed in a chroot before it builds packages
 # for the first time
@@ -178,7 +178,7 @@ necessary_kconfig_options = {
         "VT": True,
         "USE_VFB": False,
     },
-    "armhf x86": {
+    "armhf armv7 x86": {
         "LBDAF": True
     }
 }

pmb/parse/arch.py

@@ -28,7 +28,7 @@ def alpine_native():
         "i686": "x86",
         "x86_64": "x86_64",
         "aarch64": "aarch64",
-        "armv7l": "armhf"
+        "armv7l": "armv7"
     }
     if machine in mapping:
         return mapping[machine]
@@ -58,6 +58,7 @@ def alpine_to_qemu(arch):
         "x86": "i386",
         "x86_64": "x86_64",
         "armhf": "arm",
+        "armv7": "arm",
         "aarch64": "aarch64",
     }
     for pattern, arch_qemu in mapping.items():
@@ -135,6 +136,7 @@ def uname_to_qemu(arch):
         "armeb": "arm",
         "armel": "arm",
         "armhf": "arm",
+        "armv7l": "arm",
         "x86_64": "x86_64",
         "amd64": "x86_64",
     }

test/testdata/aportgen/pmaports/cross/binutils-armhf/APKBUILD

@@ -12,7 +12,7 @@ depends=""
 makedepends_build=""
 makedepends_host=""
 makedepends="gettext libtool autoconf automake bison"
-arch="aarch64 x86_64 x86"
+arch="armv7 aarch64 x86_64 x86"
 license="GPL-2.0 GPL-3.0-or-later LGPL-2.0 BSD"
 subpackages=""
 source="https://ftp.gnu.org/gnu/binutils/binutils-$pkgver.tar.bz2