devel/codeblocks: fix build on non-x86

dragscroll module uses x86 assembly, disable it on non-x86 architectures:
libtool: compile: g++9 -DHAVE_CONFIG_H -I. -I../../../../src/include -I/usr/local/lib/wx/include/gtk3-unicode-3.0 -I/usr/local/include/wx-3.0 -D_FILE_OFFSET_BITS=64 -DWXUSINGDLL -DWXGTK -pthread -D_THREAD_SAFE -I../../../../src/include -I../../../../src/src -I../../../../src/sdk/wxscintilla/include -DCB_AUTOCONF -isystem /usr/local/include -DPIC -I../../../../src/include/tinyxml -DTIXML_USE_STL=YES -O2 -pipe -fstack-protector-strong -Wl,-rpath=/usr/local/lib/gcc9 -Wl,-rpath=/usr/local/lib/gcc9 -isystem /usr/local/include -fPIC -fexceptions -MT dragscrollcfg.lo -MD -MP -MF .deps/dragscrollcfg.Tpo -c dragscrollcfg.cpp -fPIC -DPIC -o .libs/dragscrollcfg.o

• dragscrollcfg.lo ---

{standard input}: Assembler messages:
{standard input}:1398: Error: unrecognized opcode: `int3'

• [dragscrollcfg.lo] Error code 1