Get a dummy keyboard working

.cargo/config

@@ -17,18 +17,11 @@ target = "thumbv6m-none-eabi"
 [target.thumbv6m-none-eabi]
 # Pass some extra options to rustc, some of which get passed on to the linker.
 #
-# * linker argument --nmagic turns off page alignment of sections (which saves
-#   flash space)
-# * linker argument -Tlink.x tells the linker to use link.x as the linker
-#   script. This is usually provided by the cortex-m-rt crate, and by default
-#   the version in that crate will include a file called `memory.x` which
-#   describes the particular memory layout for your specific chip. 
 # * inline-threshold=5 makes the compiler more aggressive and inlining functions
 # * no-vectorize-loops turns off the loop vectorizer (seeing as the M0+ doesn't
 #   have SIMD)
 rustflags = [
-    "-C", "link-arg=--nmagic",
-    "-C", "link-arg=-Tlink.x",
+    "-C", "linker=flip-link",
     "-C", "inline-threshold=5",
     "-C", "no-vectorize-loops",
 ]