Cosmetic: remove confusing init_buildenv comments (!1769)

Build dependencies don't necessarily get installed for the host arch,
that depends on the build method ("native" or not).

pmb/build/_package.py

@@ -197,10 +197,10 @@ def init_buildenv(args, apkbuild, arch, strict=False, force=False, cross=None,
     if cross == "native":
         depends_arch = args.arch_native
 
-    # Build dependencies (host arch)
+    # Build dependencies
     depends, built = build_depends(args, apkbuild, depends_arch, strict)
 
-    # Check if build is necessary (target arch)
+    # Check if build is necessary
     if not is_necessary_warn_depends(args, apkbuild, arch, force, built):
         return False