Correct includes (u8g.h) and spelling

Marlin/src/lcd/dogm/dogm_font_data_ISO10646_1.h

 #include <U8glib.h>
 
 #if defined(__AVR__) && ENABLED(NOT_EXTENDED_ISO10646_1_5X7)
-  // reduced font (only sysmbols 1 - 127) - saves about 1278 bytes of FLASH
+  // reduced font (only symbols 1 - 127) - saves about 1278 bytes of FLASH
 
 /*
   Fontname: -Marlin6x12-Fixed-Medium-R-SemiCondensed--12-110-75-75-C-60-ISO10646-1
   X Font      ascent = 8 descent=-2
   Max Font    ascent = 8 descent=-2
 */
-#include <clib/u8g.h>
+
 const u8g_fntpgm_uint8_t ISO10646_1_5x7[1328] U8G_FONT_SECTION("ISO10646_1_5x7") = {
   0x00,0x06,0x0c,0x00,0xfe,0x07,0x02,0x29,0x03,0xbf,0x01,0x7f,0xfe,0x08,0xfe,0x08,
   0xfe,0x05,0x08,0x08,0x06,0x00,0x00,0x40,0xf0,0xc8,0x88,0x88,0x98,0x78,0x10,0x05,
   0x40,0x20,0x40,0x40,0x40,0x80,0x05,0x03,0x03,0x06,0x00,0x02,0x48,0xa8,0x90,0xff
   };
 #else
-  // extended (original) font (sysmbols 1 - 255)
+  // extended (original) font (symbols 1 - 255)
+
 /*
   Fontname: -Marlin6x12-Fixed-Medium-R-SemiCondensed--12-110-75-75-C-60-ISO10646-1
   Copyright: Public domain terminal emulator font.  Share and enjoy. original font -Misc-Fixed-Medium-R-SemiCondensed--12-110-75-75-C-60-ISO10646-1
   X Font      ascent = 8 descent=-2
   Max Font    ascent =10 descent=-2
 */
-#include <clib/u8g.h>
 const u8g_fntpgm_uint8_t ISO10646_1_5x7[2651] U8G_FONT_SECTION("ISO10646_1_5x7") = {
   0x00,0x06,0x0c,0x00,0xfe,0x07,0x02,0x29,0x03,0xbf,0x01,0xff,0xfe,0x0a,0xfe,0x08,
   0xfe,0x05,0x08,0x08,0x06,0x00,0x00,0x40,0xf0,0xc8,0x88,0x88,0x98,0x78,0x10,0x05,

buildroot/share/fonts/genallfont.sh

 #include <U8glib.h>
 
 #if defined(__AVR__) && ENABLED(NOT_EXTENDED_ISO10646_1_5X7)
-  // reduced font (only sysmbols 1 - 127) - saves about 1278 bytes of FLASH
+  // reduced font (only symbols 1 - 127) - saves about 1278 bytes of FLASH
 
 EOF
     cat tmp1.h >>tmp3.h
     cat << EOF >>tmp3.h
 #else
-  // extended (original) font (sysmbols 1 - 255)
+  // extended (original) font (symbols 1 - 255)
 EOF
     cat tmp2.h >>tmp3.h
     cat << EOF >>tmp3.h

buildroot/share/fonts/uxggenpages.sh

   while read PAGE BEGIN END UTF8BEGIN UTF8END; do \
     if [ ! -f ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h ]; then \
       ${EXEC_BDF2U8G} -u ${PAGE} -b ${BEGIN} -e ${END} ${FN_FONT} fontpage_${PAGE}_${BEGIN}_${END} ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h > /dev/null 2>&1 ;
-      #sed -i 's|#include "u8g.h"|#include <clib/u8g.h>|' ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h ;
+      #sed -i 's|#include "u8g.h"|#include <U8glib.h>|' ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h ;
     fi ;\
     grep -A 10000000000 u8g_fntpgm_uint8_t ${DN_DATA}/fontpage_${PAGE}_${BEGIN}_${END}.h >> tmpa ;\
     echo "    FONTDATA_ITEM(${PAGE}, ${BEGIN}, ${END}, fontpage_${PAGE}_${BEGIN}_${END}), // '${UTF8BEGIN}' -- '${UTF8END}'" >> tmpb ;\