The libx52util_convert_utf8_string function manually converts the UTF-8
string into the character map supported by the X52/X52Pro MFD. However,
there was a bug when handling malformed UTF-8 input. If the state
machine thinks it is at the start of a word and receives malformed UTF-8
input (between 0x80 and 0xC0), it will ignore the characters, but it
will not reset the entry to the map_root location, thereby causing
subsequent characters to be dropped.
This change ensures that the entry is reset to map_root[*input] after
skipping over an invalid UTF-8 sequence.
On some systems (notably FreeBSD), the make implementation makes a
distinction between $(builddir)/<path> and <path>, even when builddir is
`.`. This commit removes $(builddir) from all references to generated
files, so that these implementations don't fail. Keeping $(builddir)
causes older versions automake (1.15 and older) to generate a broken
Makefile.
nirenjan