DOTCODE: fix not emitting FNC1 (signalling non-GS1) when input

just 2 digits
cmake: set `rpath` of CLI frontend on macOS install (ticket #346,
  props Hagen Röwer)
cmake: make uninstall: update to use `-E rm` if available, warn
  rather than fatal error if fail to remove, note if leaving
  "/zint" directory unremoved (i.e. "lib/cmake/zint")
library: de-duplicate errtxt no.
test suite: update BWIPP to latest
test suite: test_bwipp: enable & fix dotcode random test
test suite: fuzz: gen_corpora fuzz_data 1st -> 2nd

backend/tests/data/eps/dotcode_1.0_ds0.1.eps

@@ -1,40 +1,51 @@
 %!PS-Adobe-3.0 EPSF-3.0
-%%Creator: Zint 2.12.0.9
+%%Creator: Zint 2.16.0.9
 %%Title: Zint Generated Symbol
 %%Pages: 0
-%%BoundingBox: 0 0 22 16
+%%BoundingBox: 0 0 28 18
 %%EndComments
 /D { newpath 3 1 roll 0 360 arc fill } bind def
 /R { newpath 4 1 roll exch moveto 1 index 0 rlineto 0 exch rlineto neg 0 rlineto closepath fill } bind def
 /I { 2 copy } bind def
 1 1 1 setrgbcolor
-16 0 0 22 R
+18 0 0 28 R
 0 0 0 setrgbcolor
-15 0.1 I 1 D
+17 0.1 I 1 D
 I 9 D
-I 13 D
 I 17 D
-21 D
-13 0.1 I 7 D
-I 11 D
-15 D
-11 0.1 I 1 D
-I 5 D
-I 13 D
-I 17 D
-21 D
-9 0.1 3 D
-7 0.1 I 1 D
-21 D
-5 0.1 I 3 D
-I 7 D
-I 11 D
-15 D
-3 0.1 I 1 D
-I 5 D
-I 17 D
-21 D
-1 0.1 I 3 D
+I 21 D
+25 D
+15 0.1 I 3 D
 I 7 D
 I 15 D
-19 D
+I 23 D
+27 D
+13 0.1 I 1 D
+I 5 D
+I 13 D
+25 D
+11 0.1 I 3 D
+I 7 D
+I 19 D
+23 D
+9 0.1 I 1 D
+I 13 D
+25 D
+7 0.1 I 7 D
+I 11 D
+I 15 D
+27 D
+5 0.1 I 9 D
+I 17 D
+I 21 D
+25 D
+3 0.1 I 3 D
+I 7 D
+I 11 D
+27 D
+1 0.1 I 1 D
+I 5 D
+I 9 D
+I 13 D
+I 21 D
+25 D