pmb.build.checksum: rename .check() to .update()

Rename the function to .update(), so it is clear what it does, and it is
clear what the difference to .verify() in the same file is.

pmb/build/checksum.py

@@ -24,7 +24,7 @@ import pmb.helpers.run
 import pmb.helpers.pmaports
 
 
-def check(args, pkgname):
+def update(args, pkgname):
     """ Fetch all sources and update the checksums in the APKBUILD. """
     pmb.build.init(args)
     pmb.build.copy_to_buildpath(args, pkgname)

pmb/helpers/frontend.py

@@ -122,7 +122,7 @@ def checksum(args):
         if args.verify:
             pmb.build.checksum.verify(args, package)
         else:
-            pmb.build.checksum.check(args, package)
+            pmb.build.checksum.update(args, package)
 
 
 def chroot(args):

test/test_aportgen_device_wizard.py

@@ -134,7 +134,7 @@ def test_aportgen_device_wizard(args, monkeypatch):
 
     # Build the device package
     pkgname = "device-testsuite-testdevice"
-    pmb.build.checksum.check(args, pkgname)
+    pmb.build.checksum.update(args, pkgname)
     pmb.build.package(args, pkgname, "armhf", force=True)
 
     # Abort on overwrite confirmation